Company lists · Data refreshed September 2026
Top 10 Tax advisory firms based in Ottawa, Canada
RevenueBase identified 28 company matches for tax advisory firms associated with Ottawa, Canada as of September 2026 and tracks 860 professional contacts across them, including 405 with verified work emails. Across Canada, Toronto is the largest hub for this category (120 companies); Ottawa has 28.
This list covers company matches for tax advisory firms associated with Ottawa, Canada, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 22, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 10 largest tax advisory firms based in Ottawa, Canada
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 399 contacts → | ||||
Exact match “Welch LLP is a Chartered Public Accounting firm that has deep roots in the communities it serves.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 2 | 109 contacts → | ||||
Exact match “Marcil Lavallée est un partenaire engagé qui contribue activement à la réussite de ses clients en anticipant leurs besoins et en leur offrant une gamme complète de solutions…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 3 | 94 contacts → | ||||
Exact match “GGFL is the tax planning and accounting firm for Ottawa’s successful business people.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 4 | 80 contacts → | ||||
Exact match “At Baker Tilly Ottawa LLP, we provide expert tax, assurance, and entrepreneurial services to help your business grow and prosper.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 5 | 13 contacts → | ||||
Exact match “AI Tax Consultants specializes in delivering tax and accounting services to individuals, self-employed and corporations.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 6 | 8 contacts → | ||||
Exact match “Vaive and Associates Professional Corporation is a tax consulting, business advisory and accounting firm.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 7 | 8 contacts → | ||||
Exact match “Armstrong Jones LLP is an accounting firm based in Ottawa, Ontario that offers services in accounting, audit and assurance, tax planning and compliance, and a wide array of…” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 8 | 4 contacts → | ||||
Exact match “Pryor Tax Law is a boutique law firm with expertise in Canadian, U.S.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 9 | 3 contacts → | ||||
Exact match “Blachford Tax Law represents individuals and businesses who are facing significant tax disputes with the Canada Revenue Agency.” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
| 10 | 1 contacts → | ||||
Exact match “ibma Accounting is your wise choice!” Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “tax advisory firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 10 of 28 tax advisory firms based in Ottawa, Canada
See the full list, filter by size, metro and specialty, and access 405 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Tax advisory firms based in Ottawa, Canada at a glance
As of Sep 22, 2026Companies by employee count
Email recency for this list is measured across the whole Canada list rather than for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 28 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with Ottawa, Canada whose business descriptions match “tax advisory firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 405 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 22, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Tax advisory firms by metro in Canada
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “tax advisory firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many tax advisory firms are there based in Ottawa, Canada?
RevenueBase identified 28 company matches for tax advisory firms associated with Ottawa, Canada as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Welch LLP tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city in Canada has the most tax advisory firms?
Toronto leads Canada with 120 company records, followed by Mississauga (62) and Calgary (60). Ottawa has 28.
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 405 professional contacts with verified work emails tracked across these 28 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.
Ready to reach these companies? Verified emails and direct dials for all 28 tax advisory firms based in Ottawa, Canada. Start with a free account, no credit card.
Download this list →Related lists
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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Company intelligence · public preview
Top 10 tax advisory firms based in Ottawa, Canada
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 28 matching company records for tax advisory firms based in Ottawa, Canada, with 860 tracked contacts and 405 verified work emails.
This public preview shows 10 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 22, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 10 tax advisory firms based in Ottawa, Canada
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Welch LLPwelchllp.comHQ: Ottawa, ON, CanadaReported employees: 201-500 | Ottawa, ON, Canada | 201-500 | Exact match | 399 contacts → |
“Welch LLP is a Chartered Public Accounting firm that has deep roots in the communities it serves.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Marcil Lavalléemarcil-lavallee.caHQ: Ottawa, ON, CanadaReported employees: 51-200 | Ottawa, ON, Canada | 51-200 | Exact match | 109 contacts → |
“Marcil Lavallée est un partenaire engagé qui contribue activement à la réussite de ses clients en anticipant leurs besoins et en leur offrant une gamme complète de solutions…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Ggfl LLPggfl.caHQ: Ottawa, ON, CanadaReported employees: 51-200 | Ottawa, ON, Canada | 51-200 | Exact match | 94 contacts → |
“GGFL is the tax planning and accounting firm for Ottawa’s successful business people.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Baker Tilly Ottawa LLPbakertilly.caHQ: Ottawa, ON, CanadaReported employees: 51-200 | Ottawa, ON, Canada | 51-200 | Exact match | 80 contacts → |
“At Baker Tilly Ottawa LLP, we provide expert tax, assurance, and entrepreneurial services to help your business grow and prosper.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  AI TAX Consultantsaitax.caHQ: Ottawa, ON, CanadaReported employees: 11-50 | Ottawa, ON, Canada | 11-50 | Exact match | 13 contacts → |
“AI Tax Consultants specializes in delivering tax and accounting services to individuals, self-employed and corporations.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Vaive And Associates Professional Corporationvaiveandassociates.ca HQ: Ottawa, ON, CanadaReported employees: 11-50 | Ottawa, ON, Canada | 11-50 | Exact match | 8 contacts → |
“Vaive and Associates Professional Corporation is a tax consulting, business advisory and accounting firm.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Armstrong Jones LLParmstrongjones.caHQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 8 contacts → |
“Armstrong Jones LLP is an accounting firm based in Ottawa, Ontario that offers services in accounting, audit and assurance, tax planning and compliance, and a wide array of…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Pryor TAX LAWpryortaxlaw.comHQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 4 contacts → |
“Pryor Tax Law is a boutique law firm with expertise in Canadian, U.S.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Blachford TAX LAWblachfordtaxlaw.comHQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 3 contacts → |
“Blachford Tax Law represents individuals and businesses who are facing significant tax disputes with the Canada Revenue Agency.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Ibma Accounting Limitedibmaaccounting.caHQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 1 contacts → |
“ibma Accounting is your wise choice!” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 10 of 28 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Tax advisory firms: dataset insights
September 22, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
28 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole Canada list rather than for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 28 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 22, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Tax advisory firms by metro in Canada
Questions about this company list
What does Exact match mean for tax advisory firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many tax advisory firms did RevenueBase find based in Ottawa, Canada?
The saved snapshot records 28 matching company records, 860 tracked contacts and 405 verified emails. The public preview displays 10 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 22, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Tax advisory firms by geography
- Tax advisory firms based in Brisbane, Australia
- Tax advisory firms based in Melbourne, Australia
- Tax advisory firms based in Perth, Australia
- Tax advisory firms based in Sydney, Australia
- Tax advisory firms based in Graz, Austria
- Tax advisory firms based in Innsbruck, Austria
- Tax advisory firms based in Vienna, Austria
- Tax advisory firms based in Barueri, Brazil
- Tax advisory firms based in Belo Horizonte, Brazil
- Tax advisory firms based in Campinas, Brazil
- Tax advisory firms based in Curitiba, Brazil
- Tax advisory firms based in Londrina, Brazil
Cite this list
RevenueBase Data Team. Top 10 tax advisory firms based in Ottawa, Canada. Snapshot: September 22, 2026. https://revenuebase.ai/companies/tax-advisory-firms/canada/ottawa.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Tax advisory firms based in Brisbane, Australia
- Tax advisory firms based in Melbourne, Australia
- Tax advisory firms based in Perth, Australia
- Tax advisory firms based in Sydney, Australia
- Tax advisory firms based in Graz, Austria
- Tax advisory firms based in Innsbruck, Austria
Company intelligence · public preview
Top 10 tax advisory firms based in Ottawa, Canada
RevenueBase records 28 matching company records for tax advisory firms based in Ottawa, Canada, with 860 tracked contacts and 405 verified work emails.
This public preview shows 10 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 22, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 10 tax advisory firms based in Ottawa, Canada
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Welch LLPwelchllp.com HQ: Ottawa, ON, CanadaReported employees: 201-500 | Ottawa, ON, Canada | 201-500 | Exact match | 399 contacts → |
“Welch LLP is a Chartered Public Accounting firm that has deep roots in the communities it serves.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Marcil Lavalléemarcil-lavallee.ca HQ: Ottawa, ON, CanadaReported employees: 51-200 | Ottawa, ON, Canada | 51-200 | Exact match | 109 contacts → |
“Marcil Lavallée est un partenaire engagé qui contribue activement à la réussite de ses clients en anticipant leurs besoins et en leur offrant une gamme complète de solutions…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Ggfl LLPggfl.ca HQ: Ottawa, ON, CanadaReported employees: 51-200 | Ottawa, ON, Canada | 51-200 | Exact match | 94 contacts → |
“GGFL is the tax planning and accounting firm for Ottawa’s successful business people.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Baker Tilly Ottawa LLPbakertilly.ca HQ: Ottawa, ON, CanadaReported employees: 51-200 | Ottawa, ON, Canada | 51-200 | Exact match | 80 contacts → |
“At Baker Tilly Ottawa LLP, we provide expert tax, assurance, and entrepreneurial services to help your business grow and prosper.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | AI TAX Consultantsaitax.ca HQ: Ottawa, ON, CanadaReported employees: 11-50 | Ottawa, ON, Canada | 11-50 | Exact match | 13 contacts → |
“AI Tax Consultants specializes in delivering tax and accounting services to individuals, self-employed and corporations.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Vaive And Associates Professional Corporationvaiveandassociates.ca HQ: Ottawa, ON, CanadaReported employees: 11-50 | Ottawa, ON, Canada | 11-50 | Exact match | 8 contacts → |
“Vaive and Associates Professional Corporation is a tax consulting, business advisory and accounting firm.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Armstrong Jones LLParmstrongjones.ca HQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 8 contacts → |
“Armstrong Jones LLP is an accounting firm based in Ottawa, Ontario that offers services in accounting, audit and assurance, tax planning and compliance, and a wide array of…” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Pryor TAX LAWpryortaxlaw.com HQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 4 contacts → |
“Pryor Tax Law is a boutique law firm with expertise in Canadian, U.S.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Blachford TAX LAWblachfordtaxlaw.com HQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 3 contacts → |
“Blachford Tax Law represents individuals and businesses who are facing significant tax disputes with the Canada Revenue Agency.” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Ibma Accounting Limitedibmaaccounting.ca HQ: Ottawa, ON, CanadaReported employees: 1-10 | Ottawa, ON, Canada | 1-10 | Exact match | 1 contacts → |
“ibma Accounting is your wise choice!” Recorded description excerpt · September 22, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 10 of 28 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Tax advisory firms: dataset insights
September 22, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
28 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured across the whole Canada list rather than for Ottawa, so it is reported there. Company counts and contact totals on this page are exact for Ottawa, over 28 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 22, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Tax advisory firms by metro in Canada
Questions about this company list
What does Exact match mean for tax advisory firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many tax advisory firms did RevenueBase find based in Ottawa, Canada?
The saved snapshot records 28 matching company records, 860 tracked contacts and 405 verified emails. The public preview displays 10 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 22, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Tax advisory firms by geography
- Tax advisory firms based in Brisbane, Australia
- Tax advisory firms based in Melbourne, Australia
- Tax advisory firms based in Perth, Australia
- Tax advisory firms based in Sydney, Australia
- Tax advisory firms based in Graz, Austria
- Tax advisory firms based in Innsbruck, Austria
- Tax advisory firms based in Vienna, Austria
- Tax advisory firms based in Barueri, Brazil
- Tax advisory firms based in Belo Horizonte, Brazil
- Tax advisory firms based in Campinas, Brazil
- Tax advisory firms based in Curitiba, Brazil
- Tax advisory firms based in Londrina, Brazil
Cite this list
RevenueBase Data Team. Top 10 tax advisory firms based in Ottawa, Canada. Snapshot: September 22, 2026. https://revenuebase.ai/companies/tax-advisory-firms/canada/ottawa.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Tax advisory firms based in Brisbane, Australia
- Tax advisory firms based in Melbourne, Australia
- Tax advisory firms based in Perth, Australia
- Tax advisory firms based in Sydney, Australia
- Tax advisory firms based in Graz, Austria
- Tax advisory firms based in Innsbruck, Austria